icons

HTML

<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css">
<div class="blue">

    
 <span class="fa-stack fa-lg">
  <i class="fa fa-square fa-stack-2x "></i>
   <i class="fa fa-minus fa-stack-1x fa-inverse"></i>
</span>

<span class="fa-stack fa-lg">
  <i class="fa fa-circle fa-stack-2x"></i>
  <i class="fa fa-flag fa-stack-1x fa-inverse"></i>
</span>
</div>

CSS

.blue{
    color:#4f81bd;
}